lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / Cài / è / fǎn / duì / Yuán / Shì / kǎi / fù / bì / dì / zhì / de / shì / jì

历史课上，老师介绍了蔡锷反对袁世凯复辟帝制的事迹。

In history class, the teacher introduced Cai E's opposition to Yuan Shikai's attempt to restore the monarchy.